I'm sure these have been suggested before, so I'll reiterate.
1. Remove 5 campaigns. Way too many now, and the pop is spread thin, except for Wabbajack, and Auriel's Bow (well, AB suffered a pop decline.)
2. 90 days is too long. 30 days would be better.
3. Create a VR server, vr1-12. Create a couple non-vr server, 1-50. Create a server for all levels and ranks. As the game continues on we can move away from separating the levels and ranks like this, but as it stands now lower levels need a fighting chance in PvP. We will, however, need to maintain at least one 1-50 PvP and one vr1-12 campaign.
With the last suggestion, when a player reaches vr1 then they are rewarded a free campaign transfer that must be done once they reach that rank with that character.